Pokémon X and Pokémon Y

On the whole Sylveon issue, I'm personally stumped. As completely unlikely as it is, I say a new type fits it best, like, Light or whatever. Unless they're doing type repeats, the only types it fits are either taken (like Psychic) or in the case of normal, it wouldn't really work (as it's too dissimilar to Eevee). Honestly, I have no idea. I can't see Nintendo making a new type or starting repeats, but I feel like those are the only too options that work.